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參數(shù)資料
| 型號： | MT8931C-1 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit |
| 中文描述： | 意法半導體的CMOS總線⑩家庭用戶網(wǎng)絡(luò)接口電路 |
| 文件頁數(shù)： | 3/39頁 |
| 文件大?。?/td> | 833K |
| 代理商： | MT8931C-1 |
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Data Sheet
MT8931C
3
9
16
R/W
/
WR
Read/Write or Write Input:
(R/W=0) in Motorola bus mode. Redefined to WR in Intel bus mode.
10
17
DS/RD
Data Strobe/Read Input:
active high input indicates to the SNIC that valid data is on
the bus during a write operation or that the SNIC must output data during a read
operation in Motorola bus mode. Redefined to RD in Intel bus mode.
Address Strobe/Address Latch Enable Input:
in Motorola bus mode the falling edge
is used to strobe the address into the SNIC during microprocessor access. Redefined
to ALE in Intel bus mode.
Chip Select Input:
active low, used to select the SNIC for microprocessor access.
Interrupt Request (Open Drain Output):
an output indicating an unmasked HDLC
interrupt. The interrupt remains active until the microprocessor clears it by reading the
HDLC Interrupt Status Register. This interrupt source is enabled with B2=0 of Master
Control Register.
New Data Available (Open Drain Output):
an active low output signal indicating
availability of new data from the S-Bus. This signal is selected with B2=1 of Master
Control Register. This pin must be tied to V
DD
with a 10k
resistor.
Ground.
Bidirectional Address/Data Bus:
electrically and logically compatible to either Intel or
Motorola micro-bus specifications. If DS/RD is low on the rising edge of AS/ALE then
the chip operates to Motorola specs. If DS/RD is high on the rising edge of AS/ALE Intel
mode is selected. Taking Rsti low sets Motorola mode.
11
19
AS/ALE
12
13
20
21
CS
IRQ
NDA
14
15-
22
22
V
SS
24-26,
30-32,
34-35
AD0-7
23
37
Rsti
Reset Input:
Schmitt trigger reset input. If ’0’, sets all control registers to the default
conditions, resets activation state machines to the deactivated state, resets HDLC,
clears the HDLC FIFO‘s. Sets the microport to Motorola bus mode.
24
38
STAR/Rsto
Star/Reset (Open Drain Output):
192kbit/s Rx data output fixed relative to the ST-BUS
timebase. A group of NTs, in fixed timing mode, can be wire or’ed together to create a
Star configuration. Active low reset output in TE mode indicating 128 consecutive
marks have been received. Can be connected directly to Rsti to allow NT to reset all
TEs on the bus. This pin must be tied to V
DD
with a 10 k
resistor.
LRx
Receive Line Signal Input:
this is a high impedance input for the pseudoternary line
signal to be connected to the line through a 2:1 ratio transformer. See Figures 20 and
21. A DC bias level on this input equal to V
Bias
must be maintained.
LTx
Transmit Line Signal Output:
this is a current source output designed to drive a
nominal 50 ohm line through a 2:1 ratio transformer. See Figures 20 and 21.
V
Bias
Bias Voltage:
analog ground for Tx and Rx transformers. This pin must be decoupled
to V
DD
through a 10
μ
F capacitor with good high frequency characteristics.
V
DD
Power Supply Input.
NC
No Connection.
25
40
26
42
27
43
28
44
1,5-6,10-
12,15,18,
23,27-29,
33, 36,
39, 41
Pin Description (continued)
Pin #
Name
Description
DIP PLCC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT8931CE | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8931C | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8931CC | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8931CP | CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit |
| MT8941 | Advanced T1/CEPT Digital Trunk PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8931CC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information |
| MT8931CE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Network Interface Circuit |
| MT8931CP | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Network Interface Circuit |
| MT8940 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1/CEPT Digital Trunk PLL |
| MT8940-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1/CEPT Digital Trunk PLL |
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